The TFT or LCD screen of your notebook or desktop computer is sensitive to fingerprints and dust. Unlike the standard CRT monitors with glass screens, you are not advised to clean an LCD Monitor by wiping it with a piece of dry lint-free cloth since the sensitive display is likely to get scratches from dust particles.
So how do you clean an LCD monitor screen without buying any of those expensive LCD Monitor Cleaner solutions or Monitor Wipes available today? Here are the proper methods and precautions before you clean the monitor. This should also apply to projection TV’s, HDTV’s, and plasma TV’s as well.
Be Gentle- Be very gentle and never put even the slightest pressure on the computer screen with your hand.
Soft Cotton Cloth Only – Do not use tissue paper, toilet paper or even wash rags as the fabric will scratch your screen permanently
Turn the Computer Off - This will easily help you identify the dirty areas of the monitor.
Deionized or Distilled Water and Vinegar or Iso-Propyl Alcohol Solution (IPA) – Do not use tap water or mineral water as they could leave white marks on the screen because of the dissolved salts. How to make solution: Dilute the vinegar or IPA with distilled water [1:1] and spray this liquid on the cloth. Never ever spray liquid directly onto the LCD screen. Moisten the cloth with this homemade LCD cleaner and gently move the wet cloth in just one direction - from top to bottom.
Cautions: Be sure that the LCD screen is dry before closing it or using the computer. Do not use any solutions that contain Acetone, ethyl alcohol, toluene, ethyl acid, ammonia, or methyl chloride. Never touch the LCD screen with your fingers as this can cause the pixels to burn out.

